Measurement of differential cross sections of isolated-photon plus heavy-flavour jet production in pp collisions at √s =8 TeV using the ATLAS detector

0500194 - FZÚ 2019 RIV NL eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2881 authors
Measurement of differential cross sections of isolated-photon plus heavy-flavour jet production in pp collisions at √s =8 TeV using the ATLAS detector.
Physics Letters. B. Roč. 776, Jan (2018), s. 295-317. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT(CZ) LTT17018
Institutional support: RVO:68378271
Keywords : CERN LHC Coll * sensitivity * ATLAS * two-photon * rapidity dependence * experimental results * 8000 GeV-cms
OECD category: Particles and field physics
Impact factor: 4.162, year: 2018

This Letter presents the measurement of differential cross sections of isolated prompt photons produced in association with a b -jet or a c -jet. These final states provide sensitivity to the heavy-flavour content of the proton and aspects related to the modelling of heavy-flavour quarks in perturbative QCD. The measurement uses proton–proton collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of up to 20.2 fb −1 . The differential cross sections are measured for each jet flavour with respect to the transverse energy of the leading photon in two photon pseudorapidity regions: |ηγ|<1.37 and 1.56<|ηγ|<2.37 . The measurement covers photon transverse energies 25<ETγ<400 GeV and 25<ETγ<350 GeV respectively for the two |ηγ| regions. For each jet flavour, the ratio of the cross sections in the two |ηγ| regions is also measured.

Permanent Link: http://hdl.handle.net/11104/0292313